Concept · Glossary
Ecosystem extent
Also: extent, nature extent
Definition
The size of an ecosystem asset, the area it covers. In the SEEA's ecosystem accounts it is the companion to condition: extent is how much habitat there is, condition is whether that habitat is functioning. A nature disclosure needs both.
Ecosystem extent is the area an ecosystem covers: the size of the asset. In the SEEA’s ecosystem accounting it is one of the two halves of an ecosystem’s account, the other being condition. Extent answers how much; condition answers how well.
Of the two, extent is the easier to measure. Counting hectares of woodland, grassland or wetland is relatively straightforward, and much of it can be read directly from a map or a single satellite classification. Condition, whether those hectares are working, recovering or failing, is the harder and more decision-relevant half, and it is the one most disclosure frameworks leave without a defined metric.
A complete nature disclosure reports both. EcoIntel reads extent from parcel geometry and condition from the Land Health Score, so the two sit side by side in one assessment rather than being commissioned separately. Reporting extent without condition produces an inventory with no health check: a record of where land is and how much of it there is, silent on whether any of it is functioning.